Perhaps you should try some spelling variations:
"coder documentation arc routing problem" » "model documentation arc routing problem" (Expand search), "car documentation arc routing problem" (Expand search), "care documentation arc routing problem" (Expand search), "coder documentation and routing problem" (Expand search), "coder documentation at routing problem" (Expand search), "coder documentation au routing problem" (Expand search), "coder documentation arc routine problem" (Expand search), "coder documentation arc routines problem" (Expand search)
"api python python python programming" » "api pythons python python programming" (Expand search), "api piton python python programming" (Expand search), "api pitons python python programming" (Expand search), "rpa python python python programming" (Expand search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder documentation arc routing problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder documentation arc routing problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder documentation arc routing problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder documentation arc routing problem") OR ("api python python python programming"))*.